to seoul where the navy is get ing ready to react to an expected missile launch by north korea this month. paula hancocks is following this story. i asked her what more we know about north korea's plans. >> tom, as north korea prepares to launch its second rocket this year, as early as monday, the u.s. is making preparations of its own. the navy is moving two guided missile destroyers to the region, although they're not saying exactly where. pyongyang says they are trying to send a working satellite into orbit. but the u.s. and other countries simply don't believe that. they believe that this is a cover for testing the long-range missile technology, which is banned by the united nations. one senior government official here in seoul tells me that a motivation behind this rocket launch may also be domestic instability. the source says that kim jong-un's rule may not be as secure as previously thought. and this kind of rocket launch could deflect any attention from that. tom? >> as you may recall, the last launch there did not go very well at all. >>> next to gaza city, where after 45 years